Dirt, leaves and algae in a pool?s corners will create persistent problems. Eliminating these ?dead spots? requires a properly functioning circulation system that redistributes debris between the strainer and the filter.

Cryptosporidium, or crypto as it is often called, has become the leading cause of recreational water illnesses in the United States, according to surveillance reports published by the Centers for Disease Control and Prevention in Atlanta.

Consider this: Standard commercial buildings in the United States pour through an average of 9.5 billion gallons of water every day, according to GreenBiz.com, a leading environmental responsibility information resource.